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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/15178

Title: Auxin and Cytokinin Metabolism and Root Morphological Modifications in Arabidopsis thaliana Seedlings Infected with Cucumber mosaic virus (CMV) or Exposed to Cadmium
Authors: Vitti, Antonella
Nuzzaci, Maria
Scopa, Antonio
Tataranni, Giuseppe
Remans, Tony
Vangronsveld, Jaco
Sofo, Adriano
Issue Date: 2013
Publisher: MDPI AG
Abstract: Arabidopsis thaliana L. is a model plant but little information is available about morphological root changes as part of a phytohormonal common response against both biotic and abiotic stressors. For this purpose, two-week-old Arabidopsis seedlings were treated with 10 mu M CdSO4 or infected with CMV. After 12 days the entire aerial parts and the root system were analyzed, and the presence of CMV or the accumulation of Cd were detected. Microscopic analysis revealed that both CMV and Cd influenced root morphology by a marked development in the length of root hairs and an intense root branching if compared to controls. Among the three treatments, Cd-treated seedlings showed a shorter root axis length and doubled their lateral root diameter, while the lateral roots of CMV-infected seedlings were the longest. The root growth patterns were accompanied by significant changes in the levels of indole-3-acetic acid, trans-zeatin riboside, dihydrozeatin riboside, as a probable consequence of the regulation of some genes involved in their biosynthesis/degradation. The opposite role on root development played by the phythormones studied is discussed in detail. The results obtained could provide insights into novel strategies for plant defense against pathogens and plant protection against pollutants.
Notes: Univ Basilicata, Sch Agr Forestry Food & Environm Sci, I-85100 Potenza, Italy. Hasselt Univ, Environm Biol Ctr Environm Sci, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/15178
Link to publication: http://www.mdpi.com/1422-0067/14/4/6889
DOI: 10.3390/ijms14046889
ISI #: 000318017100018
ISSN: 1422-0067
Category: A1
Type: Journal Contribution
Validation: ecoom, 2014
Appears in Collections: Research publications

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